Diego seeks relationship advice from Tosh. Athena and Río talk about her surprise gift. The D'artagnans begin a crawl through the heart of the cathedral in an attempt to find Ara and rescue Jacob.

The D’Artagnans continue their investigation into the church, hoping to uncover Jacob’s whereabouts. Diego searches for a loophole while Athena receives another vision, and Brother Jacob extends an invitation to return for a ceremony. Later, after being targeted by a very specific kind of advertising, Río, Athena, and Sylvia visit an antique shop—where Río receives an unexpected gift.

The D'artagnans finally reach Ostium. Diego reconnects with an old friend, who enlists his help in tracking down Jacob in exchange for information about Ara.

Diego and Sylvia create a new firearm together, and Sylvia talks with him about Morbash. Río wants Diego to choose his own happiness. A secret is finally brought to light, and the D'artagnans set off for Ostium. Sylvia delivers the tea about Apollo and a cat named Ugly.

Diego isn't quite himself and it's Athena's turn to help. Later, they both return to Sylvia's home and find out what Morbash was up to. Diego seeks to thwart his plans. Río and Tosh have perhaps their very first heart to heart. Athena grills Río about the masquerade. Diego checks in on Sylvia.

Athena and Tosh lay Pan's father to rest. Diego and Athena have a heart to heart. The D'artagnans make it to Jager and Diego checks in on an old flame. Sylvia is well-guarded, and also very busy working on something. The group convenes at a tavern and run into some familiar rivals.

Pan flashes back to his painful past as the D'artagnan's combat ensues.

The D'artagnans split up to better protect Pan. Pan opens up more about his past. Combat begins.

The D'artagnans stock up before beginning their journey to Jager. They meet a mysterious hunter in the woods. Pan may be in danger.

Stakes are high as things wind down in the Tenebris Forest. Athena and Tosh have a heart-to-heart about the right way to approach Hesto. Río receives a letter from Apollo. Tosh and Athena speak to Hesto at the celebration, while Diego assists Río in freeing Pan and a new friend from the zoo. The General attends the celebration, and Tosh facilitates a reconciliation between him and Hesto. Feeling more like herself than she has in a long time, Río performs at the celebration. The D'artagnans discuss their next moves.